ethyl radical vs ethyl group

ethyl radical and ethyl group both are nouns.

Word	Noun	Adjective	Verb	Adverb
ethyl radical	Yes	No	No	No
ethyl group	Yes	No	No	No

As nouns, ethyl radical and ethyl group are synonyms defined as:

ethyl radical and ethyl group: the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom

Other synonyms of ethyl radical include ethyl.

ethyl radical (noun)	ethyl group (noun)
the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom	the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom